List of top Chemistry Questions

The IUPAC name of these is
Electrovalent compounds are made up of
The bond order of $CO$ molecule is
$CaO$ and $NaCl$ have the same crystal structure and approximately the same ionic radii. If $U$ is the lattice energy of $NaCl$, the approximate lattice energy of $CaO$ is
Which of the following expressions correctly represents the equivalent conductance at infinite dilution of ${Al2(SO4)3}$ ? Given that ${\wedge^{\circ}_{Al^{3+}}}$ and ${- \wedge^{\circ}_{SO^{2-}_4}}$ are the equivalent conductances at infinite dilution of the respective ions
The following two reactions are known ${Fe2O3(s) + 3CO(g) -> 2Fe(s) + 3CO2(g); \Delta H = - 26.8 \, kJ }$ ${FeO(s) + CO (g) -> Fe(s) + CO2(g); \Delta H - 16.5 \, kJ}$ The value of $\Delta H$ for the following reaction ${Fe2O3(s) + CO(g) -> 2FeO(s) + CO2(g) }$ is
Which of the following is similar to graphite
Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. $HCl$ solution and one formed a black precipitate with $H_{2} S$. The salt could be
Liebig? method is used for the estimation of
The vapour density of ozone is
Hyperconjugation involves
Chloride ion and potassium ion are isoelectronic. Then :
Phosphate pollution is caused by:
Experiment to study kinetics of the dissociation of hydrogen peroxide must be performed by group of two or three so that -
In redox reaction $1\, g$-eq of reducing agent requires $Pgm$-e of oxidising agent. The value of $P$ is
Which of the following pairs has both members from the same period of periodic table :
In the periodic table, with the increase in atomic number, the metallic character of an element
Eutrophication causes reduction in
Which of the following statements is/are true? 1. $PH _{5}$ and $BiCl _{5}$ do not exist. 2. $pm - d \pi$ bond is present in $SO _{2}$. 3. $I _{3}{ }^{+}$has bent geometry. 4. $SeF _{4}$ and $CH _{4}$ have same shape.
When the temperature is raised, the viscosity of liquid decreases this is because
Coolant used in car radiator is aqueous solution of ethylene glycol. In order to prevent the solution from freezing at $-0.3^{\circ} C$. How much ethylene glycol must be added to $5\, kg$ of water ? $\left( K_f =1 \cdot 86\, Kg\, mol ^{-1}\right)$
On treatment of propanone with dilute $Ba(OH)_2$, the product formed is
The correct sequence which shows decreasing order of the ionic radii of the elements is
The species having pyramidal shape is
Frenkel defect is generally observed in